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Oh good, repairs needed

Old 12-03-2017, 08:01 AM
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Oh good, repairs needed

Crap, my water pump seal has failed. Ordered the parts this morning. The question I have is there a risk of coolant getting into the crankcase? As I recall coolant isn't a reliable lubricant. Oil in sight glass still looks fine, but....
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Old 12-03-2017, 08:09 AM
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When the water pump coolant seal fails, coolant will drain out of a weep hole before it can get to the oil seal. Have you had coolant coming out of the weep hole?

When you have your water pump removed, you'll see how it works.
Regarding the seals, take a look at a parts diagram.
https://www.partzilla.com/catalog/ho...awk/water-pump

Last edited by CruxGNZ; 12-03-2017 at 08:23 AM. Reason: Info bro
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Old 12-03-2017, 08:19 AM
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Yeah the weep hole is pissing coolant. The thing that is worrisome is the coolant is brown. I don't think that it's oil because it rinses off with just water.
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Old 12-03-2017, 08:29 AM
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It could be brown from long coolant flush intervals. FYI- there are steel components inside the cooling system of our bikes, and steel rusts. That's just one of the reasons why it's not a good idea to use only water inside the cooling system on a street bike.

Last edited by CruxGNZ; 12-03-2017 at 08:32 AM.
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Old 12-03-2017, 08:32 AM
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Fresh coolant as of a month and a half ago.
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Old 12-03-2017, 01:29 PM
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While it’s possible for the impeller seal and the oil
seal to both fail allowing coolant into the motor it’s super rare in all models and I’ve never seen it on a SH at all.
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Old 12-03-2017, 02:59 PM
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Originally Posted by E.Marquez View Post
While itís possible for the impeller seal and the oil
seal to both fail allowing coolant into the motor itís super rare in all models and Iíve never seen it on a SH at all.
Thank you.
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Old 12-03-2017, 04:11 PM
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Just as long as the clutch gasket is fitted correctly...
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Old 12-03-2017, 04:13 PM
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Originally Posted by Wicky View Post
Just as long as the clutch gasket is fitted correctly...
As in the right crank case cover gasket?
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Old 12-03-2017, 09:25 PM
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Yeah did this job recently. The brown is as stated probly rust and dirt from the system. Just do the fix and you should be fine.
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Old 12-04-2017, 05:39 AM
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Originally Posted by xeris View Post
As in the right crank case cover gasket?
Yes, the right side gasket.
It both seals the coolant passage from pump to motor (red circle) but it has a line of sealant that directs leaking coolant to the weep hole (green line)

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Old 12-04-2017, 01:56 PM
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as has been said, its the outside seal thats went, pretty common... just make sure if you strip the impeller shaft that you put the impeller back properly. measure it before you strip it. the seals and shaft have a little end float in them.
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Old 12-04-2017, 04:43 PM
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No offense intend, but I would not measure what is..
A it failed, so who knows what is where.
B: who knows if it was correct.//or at the end of the spec, middle, beginning...
The Service manual has the specs. and fabiostar is dead on....it has to be installed to the correct depth or the impeller chews up the cover or case...So use the manual Specs
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Old 12-05-2017, 06:23 AM
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Originally Posted by E.Marquez View Post
No offense intend, but I would not measure what is..
A it failed, so who knows what is where.
B: who knows if it was correct.//or at the end of the spec, middle, beginning...
The Service manual has the specs. and fabiostar is dead on....it has to be installed to the correct depth or the impeller chews up the cover or case...So use the manual Specs
Ordered all the parts a couple of days ago.
Don't own a press, so I .will have to rig a substitute. Since neither cover is available new, I sure don't want to damage them. At .010" variance, not much room for mistakes there either. Really though, how hard can it be? I've f'ed simpler projects in the past, so...
I would ask the machinist that did some other work for me, but he is retired and really does work as favors, and I've used up all of mine.
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